Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A communication system in which a plurality of communication terminal devices perform radio communication via a network configured by a network-side device including one or a plurality of base station devices, the communication system comprising: a plurality of cells configured by said one or the plurality of base station devices and connected to said plurality of communication terminal devices to perform radio communication with said plurality of communication terminal devices, wherein said plurality of cells are grouped into a plurality of groups by said network-side device and said network-side device notifies said plurality of communication terminal devices of information on said plurality of groups, a communication terminal device, in said plurality of communication terminal devices is configured to (a) in an idle state, select a first group or a second group from the plurality of groups and measure cells belonging to the selected first or second group for re-selection, the first group including a cell on which the communication terminal device camps, and the second group being different from the first group, and (b) in a connected state, select a third group or a fourth group from the plurality of groups and measure cells belonging to the selected third or fourth group for handover, the third group including a cell to which the communication terminal device is connected, and the fourth group being different from the third group.
This invention relates to a communication system where multiple communication terminal devices perform radio communication via a network managed by a network-side device, which includes one or more base station devices. The network is divided into multiple cells, each configured by a base station device and connected to communication terminal devices for radio communication. The network-side device groups these cells into multiple groups and notifies the communication terminal devices about the grouping information. In an idle state, a communication terminal device selects either a first group or a second group from the available groups. The first group includes the cell on which the device is currently camping, while the second group is distinct from the first. The device then measures cells belonging to the selected group for potential re-selection. In a connected state, the device selects either a third group or a fourth group. The third group includes the cell to which the device is currently connected, while the fourth group is different from the third. The device measures cells in the selected group for handover purposes. This grouping and selective measurement approach optimizes network resource usage and improves communication efficiency by reducing unnecessary measurements and signaling overhead.
2. The communication system according to claim 1 , wherein said plurality of cells are grouped based on a cell size of each of the plurality of cells, and said communication terminal device is configured to determine, based on a moving speed of the communication terminal device, which of a fifth group and a sixth group among the plurality of groups is to be selected, the fifth group including a cell having a same cell size as the cell on which the communication terminal device camps or to which the communication terminal device is connected, and the sixth group including a cell having a different cell size from the cell on which the communication terminal device camps or to which the communication terminal device is connected.
The communication system optimizes network selection for mobile devices by dynamically grouping cells based on their size and adjusting connectivity decisions according to the device's movement speed. In wireless networks, mobile devices must efficiently select and switch between cells to maintain stable connections, especially when moving at varying speeds. The system addresses this by categorizing cells into groups based on their size, such as macro, micro, or pico cells, and further divides them into two primary groups: a fifth group containing cells of the same size as the current serving cell and a sixth group containing cells of different sizes. The mobile device determines its movement speed and selects the appropriate group for handover or connection. For example, a fast-moving device may prioritize larger cells for broader coverage, while a stationary or slow-moving device may prefer smaller cells for higher capacity. This adaptive grouping and selection process enhances network efficiency by reducing unnecessary handovers and improving connection stability. The system ensures seamless connectivity by dynamically adjusting cell selection based on real-time mobility conditions.
3. The communication system according to claim wherein said plurality of cells are grouped based on a cell size of each of the plurality of cells, and said communication terminal device is configured to determine a cell size based on a moving speed of the communication terminal device and select a group including a cell having the determined cell size.
Unknown
January 2, 2018
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